5-(Phenylethynyl)nicotinic acid is primarily utilized in the field of organic synthesis and pharmaceutical research. It serves as a key intermediate in the development of various biologically active compounds, particularly those targeting neurological and inflammatory disorders. Its structure, featuring a phenylethynyl group attached to a nicotinic acid core, makes it valuable for designing molecules with potential therapeutic properties. Researchers often employ it in the synthesis of ligands for receptors or enzymes, aiding in drug discovery efforts. Additionally, it is explored in material science for creating advanced organic materials with specific electronic or optical properties.